Nigger-bar.



I PATBNTED DEC. 22, 1903. 1). R. EDWARDS.

NIGGER BAR.

APPLICATION FILED MAR. 1, 1901.

N0 MODEL.

m: 'nonms Perms ca. PHQYO-LIYNQ, msumm'on, o. c.

DANIEL R. EDWARDS,

Patented December 22, 1903.

PATENT OFFICE.

OF EMPORIA, TEXAS.

NlGGER-BAR.

EEPEGIFICATION forming part of Letters Patent N 0. 747,391, datedDecember 22, 1903.

Application filed March 1, 1901.

- fication.

My invention relates to an improvement in nigger-bars used in connectionwith steamcylinders to turn the logs on sawmillcarriages.

The object of this invention is to provide a novel construction thatwill make a much more durable and stronger bar than those now inuse andat the same time more convenient to operate. cast a bar in one piece,making the bar hollow throughout a part of its length, which adds to itsstrength and reduces the weight. I also make the bar narrow at the top,where strain is light, and wide near the bottom, where the strain isgreat.

In the accompanying drawings, Figure 1 is a view of my improvednigger-bar in side elevation to be used in connection with twosteam-cylinders and connected to the pistonrods of the cylinders, asshown. Fig. 2 is a front elevation at right angles to that shown in Fig.1.

My improved nigger-bar is made of one piece of steel or other suitablemetal and has pockets or recesses (indicated by the numerals 2 2 2 2)for the reception of suitable teeth that go to make up a complete bar.These pockets are shown in dotted lines in Fig. 1. The teeth are notshown, but may be made of any suitable construction. The numerals 3 3 33 indicate holes for the reception of pins to fulcrum the teeth inplace.

The lower part of the bar branches each way from the center, and ateither extremity is a recess or pocket (indicated at 4. 4) for thereception of the piston-rods 5 5. These pockets or recesses 4 4. do notproject entirely through the bar, but leave a wall of solid metal, asindicated at 6 6, over the top of piston-rods 5 5. p This is done toallow the ends of the piston-rods to come in contact with this solidmetal as they push upward, and so take the heavy strain 01f the pins 88, which connect the piston-rods with the nigger-bar.

The great improvement in my style of con- To attain this object, I

Serial No. 49.529. (No model.)

struction of such a bar lies in the fact that there are no rivet-holesto reduce the strength of the bar and cause it to break, as in barsheretofore. constructed.

I may make changes in form or details of construction as I develop myinvention; but such changes shall not afiect this invention.

It will be observed by reference to the drawings that the pockets 2 2 22 are made wider at their front ends than at the rear ends thereof, inwhich the pivot-holes 3 3 3 3 are formed.

The pockets of the bar are constructed thus to receive the inner ends ofthe teeth and to permit the outer ends of the teeth to fold upward. Thebar is formed with interior webs (shown in Fig. 2) between the adjacentends of the pockets, against which the corresponding teeth may fold,said Webs limiting the movement of the corresponding teeth. Againstthese webs the corresponding teeth may rest when in working position.preferably made wider at their rear ends than at their forward ends tostrengthen the body of the bar adjacent to the rivet-holes, the websbeing tapered toward their front ends to lighten the construction of thebar and also to efiect the widening of the pockets at their forwardends. It will be seen that the teeth may be supported upon the lowerwall of the corresponding pocket throughout the whole length of theweb,the web thereby forming a very firm support for the teeth. The upperand lower walls of each of the pockets diverge from one of the endsthereof outward to the opposite ends thereof, as shown.

What I claim as my invention is- 1. A nigger-bar having a body formed ofa single integral metal casting, said body formed with teeth-pockets toreceive the inner ends of the teeth and to permit the teeth to foldupward within the corresponding pockets, said body formed with integralinterior webs between adjacent pockets to limit the movement of theteeth in thecorresponding pockets, and with pivot-holes at the rear endsof the pockets to receive the pivot-pins of the teeth, the upper andlower walls of each of said pockets diverging from'one of the ends ofthe corresponding webs to the opposite ends.

2. A nigger-bar having a body formed of a single integral metal casting,said body formed with teeth-pockets to receive the in These webs are norends of the teeth and to permit the teeth to fold upward within thecorresponding pockets, said body formed with integral interior webs tolimit the movement of the teeth in the corresponding pockets of the bar,and with pivot-holes at the rear ends of the pockets to receive thepivot-pins of the teeth, the base of each of said pockets arranged tosupport the corresponding tooth the whole length of said base when thetooth is in operative position.

3. A nigger-bar having a body formed of a single integral piece of metalbifurcated at its lowerend and constructed with teeth-pockets, said bodyat its lower end formed with recesses 4 4 and with solid walls at thetop of said recesses for the purpose described.

4. A nigger-bar having a body formed of a single integral metal castingconstructed with pockets for the reception of teeth, said bar formedwith integral webs separating adjacent pockets, and with pivot-holes atthe rear ends of said pockets to receive pivotpins of the teeth, theupper and lower walls of each of said pockets diverging from one of theends of the corresponding webs to the opposite ends, the base of each ofsaid pockets arranged to support the corresponding tooth the wholelength of said base when the tooth is in operative position.

In testimony that I claim the foregoing as my own I have aflixed mysignature in the presence of two witnesses.

DANIEL R. EDWARDS.

Witnesses:

W. N. CURLEY, T. O. SEARZ.

